Visible crew/equipment: When Mimi is escaping from the castle and swinging on the drain pipes, the wire holding the whole lot up is visible. (00:29:10)
Visible crew/equipment: When Mimi slides down the pipe, her safety cable is visible. (00:29:29)
Visible crew/equipment: After Mimi has cut off the magnetic button and launched it away with James' braces, there is a shot of the exploding grouse, and the wires making it fly are visible. (00:31:00)
Visible crew/equipment: In the shot where the 'Dual Carriageway' sign is seen and the cars drive over the camera, the man driving the milk-float that is meant to be being controlled by radio is visible. (00:35:25)
Visible crew/equipment: When Bond is arrested by a group of men, one of them carries a silver shield on his back, which reflects the set lights. (01:50:45)
Visible crew/equipment: When Le Chiffre levitates the woman, after he conceals her hand, the metal rig used to lift her becomes visible in the top right corner of the screen.
Visible crew/equipment: When the truck crashes, a filming camera is visible on the left side of the frame.
Visible crew/equipment: Before Bond and Vesper walk through the secret door, nothing is cast in front of it. However, once the door closes behind them, a shadow - presumably that of the cameraman - is cast on it.
Visible crew/equipment: When Bond reveals the coffin containing the toupee, the stage lights are reflected on the glass dome to the left.
Visible crew/equipment: When James is visited in his chambers in the Scottish Castle by the "widow", someone is in the mirror as she enters. When she moves forward, and the film cuts back to her from James, the person is no longer in the mirror, even though the angle is the same.
Answer: Given that this is a comedy, the thinking was probably "Well, we'll just blow up your retirement so you've got no choice but to come out of it."
Captain Defenestrator